Pinpoint Tests

Universal Transmitter

Pinpoint Tests


Pinpoint Test A: The Universal Transmitter Is Inoperative

Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number

Normal Operation

Vehicles with roof opening panel and auxiliary A/C have the universal transmitter located as an integral part of the LH sun visor. For vehicles without roof opening panel and auxiliary A/C, the universal transmitter is integral to the overhead console. The universal transmitter can be programmed to operate up to 3 garage doors, entry gates, security systems, and home or office lighting. Voltage is supplied from the battery saver relay in the Smart Junction Box (SJB) to the universal transmitter through the vanity mirror power circuit. The vanity mirror ground circuit provides the ground.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Universal transmitter
- Receiver unit



PINPOINT TEST A: THE UNIVERSAL TRANSMITTER IS INOPERATIVE

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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A1 CHECK THE UNIVERSAL TRANSMITTER OPERATION


- Press any of the buttons on the universal transmitter.
- Does the universal transmitter LED illuminate?

Yes
GO to A2.

No
GO to A3.

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A2 PROGRAM A HAND-HELD TRANSMITTER INTO THE UNIVERSAL TRANSMITTER


- Program the universal transmitter. Refer to Universal Transmitter Programming Programming and Relearning.
- Does the universal transmitter program successfully?

Yes
The universal transmitter is OK. VERIFY the receiver operates correctly.

No
INSTALL a new universal transmitter. For vehicles with roof opening panel and auxiliary A/C, REFER to Headliner.

For vehicles without roof opening panel and auxiliary A/C, REFER to Overhead Console in Instrument Cluster / Carrier &/or Interior Moulding / Trim. TEST the system for normal operation.

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A3 CHECK THE VANITY MIRROR LAMP POWER CIRCUIT FOR AN OPEN


- Ignition OFF.
- Disconnect: LH Vanity Mirror Lamp C907 (With Roof Opening Panel And Auxiliary A/C) or Universal Transmitter C928 (without Roof Opening Panel And Auxiliary A/C).
- Ignition ON.
- Measure the voltage between the universal transmitter C907-1 (with roof opening panel and auxiliary A/C) or C928-2 (without roof opening panel and auxiliary A/C), circuit CLN01 (GN/VT), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A4.

No
REPAIR the circuit. TEST the system for normal operation.

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A4 CHECK THE VANITY MIRROR LAMP GROUND CIRCUIT FOR AN OPEN


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the universal transmitter C907-2 (with roof opening panel and auxiliary A/C) or C928-1 (without roof opening panel and auxiliary A/C), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new universal transmitter. For vehicles with roof opening panel and auxiliary A/C, REFER to Headliner.

For vehicles without roof opening panel and auxiliary A/C, REFER to Overhead Console in Instrument Cluster / Carrier &/or Interior Moulding / Trim. TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.

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